<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <link href="MyCss.css" type="text/css" rel="stylesheet">
</head>
<body>
  <h1>
      应用了样式表
  </h1>
  <a>这是一个a标签的样式</a>
  <h2>h2样式</h2>
  <h3>h3样式</h3>
  <p>hello Css3</p>
</body>
</html>